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ae71f5de MS |
1 | /* |
2 | * "$Id$" | |
3 | * | |
4 | * cupsGetDevices implementation for the Common UNIX Printing System (CUPS). | |
5 | * | |
e07d4801 | 6 | * Copyright 2008-2009 by Apple Inc. |
ae71f5de MS |
7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Apple Inc. and are protected by Federal copyright | |
10 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
11 | * which should have been included with this file. If this file is | |
12 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
13 | * | |
14 | * This file is subject to the Apple OS-Developed Software exception. | |
15 | * | |
16 | * Contents: | |
17 | * | |
749b1e90 | 18 | * cupsGetDevices() - Get available printer devices. |
ae71f5de MS |
19 | */ |
20 | ||
21 | /* | |
22 | * Include necessary headers... | |
23 | */ | |
24 | ||
25 | #include "globals.h" | |
26 | #include "debug.h" | |
27 | ||
28 | ||
29 | /* | |
30 | * 'cupsGetDevices()' - Get available printer devices. | |
31 | * | |
32 | * This function sends a CUPS-Get-Devices request and streams the discovered | |
33 | * devices to the specified callback function. The "timeout" parameter controls | |
ed6e7faf MS |
34 | * how long the request lasts, while the "include_schemes" and "exclude_schemes" |
35 | * parameters provide comma-delimited lists of backends to include or omit from | |
36 | * the request respectively. | |
ae71f5de MS |
37 | * |
38 | * @since CUPS 1.4@ | |
39 | */ | |
40 | ||
41 | ipp_status_t /* O - Request status - @code IPP_OK@ on success. */ | |
42 | cupsGetDevices( | |
43 | http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ | |
44 | int timeout, /* I - Timeout in seconds or @code CUPS_TIMEOUT_DEFAULT@ */ | |
ed6e7faf | 45 | const char *include_schemes, /* I - Comma-separated URI schemes to include or @code CUPS_INCLUDE_ALL@ */ |
ae71f5de MS |
46 | const char *exclude_schemes, /* I - Comma-separated URI schemes to exclude or @code CUPS_EXCLUDE_NONE@ */ |
47 | cups_device_cb_t callback, /* I - Callback function */ | |
48 | void *user_data) /* I - User data pointer */ | |
49 | { | |
50 | ipp_t *request, /* CUPS-Get-Devices request */ | |
51 | *response; /* CUPS-Get-Devices response */ | |
52 | ipp_attribute_t *attr; /* Current attribute */ | |
53 | const char *device_class, /* device-class value */ | |
54 | *device_id, /* device-id value */ | |
55 | *device_info, /* device-info value */ | |
749b1e90 | 56 | *device_location, /* device-location value */ |
ae71f5de MS |
57 | *device_make_and_model, /* device-make-and-model value */ |
58 | *device_uri; /* device-uri value */ | |
59 | int blocking; /* Current blocking-IO mode */ | |
ed6e7faf | 60 | cups_option_t option; /* in/exclude-schemes option */ |
ae71f5de MS |
61 | http_status_t status; /* HTTP status of request */ |
62 | ipp_state_t state; /* IPP response state */ | |
63 | ||
64 | ||
65 | /* | |
66 | * Range check input... | |
67 | */ | |
68 | ||
e07d4801 MS |
69 | DEBUG_printf(("cupsGetDevices(http=%p, timeout=%d, include_schemes=\"%s\", " |
70 | "exclude_schemes=\"%s\", callback=%p, user_data=%p)", http, | |
71 | timeout, include_schemes, exclude_schemes, callback, | |
72 | user_data)); | |
73 | ||
ae71f5de MS |
74 | if (!callback) |
75 | return (IPP_INTERNAL_ERROR); | |
76 | ||
77 | if (!http) | |
78 | http = _cupsConnect(); | |
79 | ||
80 | if (!http) | |
81 | return (IPP_SERVICE_UNAVAILABLE); | |
82 | ||
83 | /* | |
84 | * Create a CUPS-Get-Devices request... | |
85 | */ | |
86 | ||
87 | request = ippNewRequest(CUPS_GET_DEVICES); | |
88 | ||
89 | if (timeout > 0) | |
90 | ippAddInteger(request, IPP_TAG_OPERATION, IPP_TAG_INTEGER, "timeout", | |
91 | timeout); | |
92 | ||
ed6e7faf MS |
93 | if (include_schemes) |
94 | { | |
95 | option.name = "include-schemes"; | |
96 | option.value = (char *)include_schemes; | |
97 | ||
98 | cupsEncodeOptions2(request, 1, &option, IPP_TAG_OPERATION); | |
99 | } | |
100 | ||
ae71f5de MS |
101 | if (exclude_schemes) |
102 | { | |
103 | option.name = "exclude-schemes"; | |
104 | option.value = (char *)exclude_schemes; | |
105 | ||
106 | cupsEncodeOptions2(request, 1, &option, IPP_TAG_OPERATION); | |
107 | } | |
108 | ||
109 | /* | |
110 | * Send the request and do any necessary authentication... | |
111 | */ | |
112 | ||
113 | do | |
114 | { | |
e07d4801 | 115 | DEBUG_puts("2cupsGetDevices: Sending request..."); |
ae71f5de MS |
116 | status = cupsSendRequest(http, request, "/", ippLength(request)); |
117 | ||
e07d4801 | 118 | DEBUG_puts("2cupsGetDevices: Waiting for response status..."); |
ae71f5de MS |
119 | while (status == HTTP_CONTINUE) |
120 | status = httpUpdate(http); | |
121 | ||
122 | if (status != HTTP_OK) | |
123 | { | |
124 | httpFlush(http); | |
125 | ||
126 | if (status == HTTP_UNAUTHORIZED) | |
127 | { | |
128 | /* | |
129 | * See if we can do authentication... | |
130 | */ | |
131 | ||
e07d4801 | 132 | DEBUG_puts("2cupsGetDevices: Need authorization..."); |
ae71f5de | 133 | |
e07d4801 | 134 | if (!cupsDoAuthentication(http, "POST", "/")) |
ae71f5de | 135 | httpReconnect(http); |
e07d4801 MS |
136 | else |
137 | break; | |
ae71f5de MS |
138 | } |
139 | ||
140 | #ifdef HAVE_SSL | |
141 | else if (status == HTTP_UPGRADE_REQUIRED) | |
142 | { | |
143 | /* | |
144 | * Force a reconnect with encryption... | |
145 | */ | |
146 | ||
e07d4801 | 147 | DEBUG_puts("2cupsGetDevices: Need encryption..."); |
ae71f5de MS |
148 | |
149 | if (!httpReconnect(http)) | |
150 | httpEncryption(http, HTTP_ENCRYPT_REQUIRED); | |
151 | } | |
152 | #endif /* HAVE_SSL */ | |
153 | } | |
154 | } | |
155 | while (status == HTTP_UNAUTHORIZED || status == HTTP_UPGRADE_REQUIRED); | |
156 | ||
e07d4801 | 157 | DEBUG_printf(("2cupsGetDevices: status=%d", status)); |
ae71f5de MS |
158 | |
159 | ippDelete(request); | |
160 | ||
161 | if (status != HTTP_OK) | |
162 | { | |
163 | _cupsSetHTTPError(status); | |
164 | return (cupsLastError()); | |
165 | } | |
166 | ||
167 | /* | |
168 | * Read the response in non-blocking mode... | |
169 | */ | |
170 | ||
171 | blocking = httpGetBlocking(http); | |
172 | httpBlocking(http, 0); | |
173 | ||
174 | response = ippNew(); | |
175 | device_class = NULL; | |
176 | device_id = NULL; | |
177 | device_info = NULL; | |
749b1e90 | 178 | device_location = ""; |
ae71f5de MS |
179 | device_make_and_model = NULL; |
180 | device_uri = NULL; | |
181 | attr = NULL; | |
182 | ||
e07d4801 | 183 | DEBUG_puts("2cupsGetDevices: Reading response..."); |
ae71f5de MS |
184 | |
185 | do | |
186 | { | |
187 | if ((state = ippRead(http, response)) == IPP_ERROR) | |
188 | break; | |
189 | ||
e07d4801 | 190 | DEBUG_printf(("2cupsGetDevices: state=%d, response->last=%p", state, |
ae71f5de MS |
191 | response->last)); |
192 | ||
193 | if (!response->attrs) | |
194 | continue; | |
195 | ||
196 | while (attr != response->last) | |
197 | { | |
198 | if (!attr) | |
199 | attr = response->attrs; | |
200 | else | |
201 | attr = attr->next; | |
202 | ||
e07d4801 MS |
203 | DEBUG_printf(("2cupsGetDevices: attr->name=\"%s\", attr->value_tag=%d", |
204 | attr->name, attr->value_tag)); | |
ae71f5de MS |
205 | |
206 | if (!attr->name) | |
207 | { | |
208 | if (device_class && device_id && device_info && device_make_and_model && | |
209 | device_uri) | |
210 | (*callback)(device_class, device_id, device_info, | |
749b1e90 MS |
211 | device_make_and_model, device_uri, device_location, |
212 | user_data); | |
ae71f5de MS |
213 | |
214 | device_class = NULL; | |
215 | device_id = NULL; | |
216 | device_info = NULL; | |
749b1e90 | 217 | device_location = ""; |
ae71f5de MS |
218 | device_make_and_model = NULL; |
219 | device_uri = NULL; | |
220 | } | |
221 | else if (!strcmp(attr->name, "device-class") && | |
222 | attr->value_tag == IPP_TAG_KEYWORD) | |
223 | device_class = attr->values[0].string.text; | |
224 | else if (!strcmp(attr->name, "device-id") && | |
225 | attr->value_tag == IPP_TAG_TEXT) | |
226 | device_id = attr->values[0].string.text; | |
227 | else if (!strcmp(attr->name, "device-info") && | |
228 | attr->value_tag == IPP_TAG_TEXT) | |
229 | device_info = attr->values[0].string.text; | |
749b1e90 MS |
230 | else if (!strcmp(attr->name, "device-location") && |
231 | attr->value_tag == IPP_TAG_TEXT) | |
232 | device_location = attr->values[0].string.text; | |
ae71f5de MS |
233 | else if (!strcmp(attr->name, "device-make-and-model") && |
234 | attr->value_tag == IPP_TAG_TEXT) | |
235 | device_make_and_model = attr->values[0].string.text; | |
236 | else if (!strcmp(attr->name, "device-uri") && | |
237 | attr->value_tag == IPP_TAG_URI) | |
238 | device_uri = attr->values[0].string.text; | |
239 | } | |
240 | } | |
241 | while (state != IPP_DATA); | |
242 | ||
e07d4801 | 243 | DEBUG_printf(("2cupsGetDevices: state=%d, response->last=%p", state, |
ae71f5de MS |
244 | response->last)); |
245 | ||
246 | if (device_class && device_id && device_info && device_make_and_model && | |
247 | device_uri) | |
248 | (*callback)(device_class, device_id, device_info, | |
749b1e90 | 249 | device_make_and_model, device_uri, device_location, user_data); |
ae71f5de MS |
250 | |
251 | /* | |
252 | * Set the IPP status and return... | |
253 | */ | |
254 | ||
255 | httpBlocking(http, blocking); | |
8922323b | 256 | httpFlush(http); |
ae71f5de MS |
257 | |
258 | if (status == IPP_ERROR) | |
749b1e90 | 259 | _cupsSetError(IPP_ERROR, NULL, 0); |
ae71f5de MS |
260 | else |
261 | { | |
262 | attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT); | |
263 | ||
e07d4801 | 264 | DEBUG_printf(("cupsGetDevices: status-code=%s, status-message=\"%s\"", |
ae71f5de MS |
265 | ippErrorString(response->request.status.status_code), |
266 | attr ? attr->values[0].string.text : "")); | |
267 | ||
268 | _cupsSetError(response->request.status.status_code, | |
749b1e90 MS |
269 | attr ? attr->values[0].string.text : |
270 | ippErrorString(response->request.status.status_code), 0); | |
ae71f5de MS |
271 | } |
272 | ||
273 | ippDelete(response); | |
274 | ||
275 | return (cupsLastError()); | |
276 | } | |
277 | ||
278 | ||
279 | /* | |
280 | * End of "$Id$". | |
281 | */ |